spencer



6 Sheets Sheet 1,

(No Model.)

J. SPENCER. STONE DRESSING MACHINE.

No. 575,435. Patented Jan 19,1897.

I-NVENTVOR WITN E SSES (No Model 6 Sheets-Sheet 2. J. SPENCER.

STONE DRESSING MACHINE No. 575,436. Patented Jan. 19, 1897.

NVENTOR WITNESSIES X1217 6 Sheets -Sheet 3.

(No Model.) 7

' J. SPENCER. STONE DRESSING MACHINE. Patented Jan. 19, 1897.

WITNESSES INVENITOR J- a wad/W, Q wQi/ W' (No Model.) 6 Sheets-Sheet 4.J. SPENCER.

STONE DRESSING MACHINE.

Patented Jan. 19, 1897'.

INVENTOR WITNESSES THE Noam PETERS co, PHOTO-LITHO.. WASNIVfQYON/D- c.

(N0 M aei. s sheets sheez 5.

J. SPENCER.

STONE DRESSING MACHINE.

No. 575,435. Patented Jan. 19,1897.

WITNESSES .4. 2*. M4

5 (No Model.) 6 Sheets-Sheet 6.

J. SPENCER. V STONE mmssme MACHINE. No. 575,435. Patented Jan. 19, 1897g i u P 5Q PA [I x I /Nif WI T N ESStS l Nrrnp STAT S ATENT Fries.

JOHN SPENCER, OF KEIGHLEY, ENGLAND.

STONE-DRESSING MACHINE.

SPECIFICATION forming part of Letters Patent No. 575,43 5, dated January19, 1897.

Application filed May 27, 1896. berial No. 593.265. (No model.)

T aZZ whom, it may concern.-

Be it known that 1, JOHN SPENCER, a sub-- ject of the Queen of GreatBritain, residing have invented a new and useful Stone-Dressing Machine,of which the following is a specification.

My invention relates more particularly to the class of stone-dressingmachines wherein rotary or disk cutters are employed. (although to acertain extent it may also be employed in connection with othermachines, as will hereinafter be explained.) and, as is well known tothe users of said rotary-cutter machines, considerable loss is entailedby the inability to make them perform their cutting actions over theentire surface of the stone under operation without breaking away acertain portion of same as its outer end is being approached by thecutters.

The object of this invention is to prevent this loss and produce amachine that will act or perform its cutting operations evenly over thewhole surface of such parts of the stone as are desired to be operatedupon, at one time (when only one rotary cutter is being used) performingwhat may be termed the rough cut on its advancing movement and thefinishing cut on its receding or return movement, while at another time(when two or more rotary cutters are being used) it may be used toperform both of these actions at each advancing and receding movement.In each of these cases the moving of the circular cutter or cutters isrendered necessary to bring it or them into the desired position or tothe most appropriate angle relatively with the line of action to enableit or them to perform its or their functions efficiently. This object Iattain by the means hereinafter described,

reference being had to the accompanying tion of the machine and showsthe method of y l coupling same to an additional operatingcrank. Figs. 6and '7 are side and sectional elevations, drawn to an enlarged scale, ofpart shown by Fig. 5. Figs. 8, 9, and 10 are front, back, and top viewsof the 'parts for supporting and operating the cutters, these being alsodrawn to an enlarged scale. Figs. 11 and 12 are drawings in detail,enlarged scale, illustratin g the bearin g spindles or studs on whichthe trunnions for supporting the machines table are mounted. Fig. 13 isside elevation similar to Fig. 4, but shows a modification in theformation of the vertical supports whereby I am enabled to make thecutters operate at any desired angle to the vertical plane, for purposeshereinafter explained. Fig. la is a drawing in detail of the parts shownby Fig. 5 and as seen from above. Fig. 15 is sectional end elevation ofa piece of cut stone to illustrate the result attainable by certainadjustments and actions of the machine.

Similar letters and figures of reference indicate similar partsthroughout the several views.

The bed a and the upright 12 constitute the principal portions of themachines framework.

The circular cutters c are mounted upon a spindle d, arranged to rotatefreely within the bearings e. The forces acting thereon, being cl, arewithstood by the cross-piece e, which is secured by bolts e e to thebearings e and against which the end of the spindle d abuts. The pivotalarm 6 of the bearings e is arranged to pass through the swivel f, whichforms sufficient support for it and allows it'to be moved therein on thewheel a, secured to it, being rotated by the worm 6, carried by the rodf", as is hereinafter explained.

The swivelf is mounted upon the bar g by its pivotal arm f passingthrough it, so that the lever f maybe secured to it to enable it to beoscillated by the rod f, hereinafter described.

The bar 9 fits within the slide h, where it is held by the cross-piecesg g g, secured by their several screws, and by this bar 9 being squarein cross'section it will fit equally Well within said box whether it isin the position therein shown by the several drawings or in chiefly in adirection lengthwise this spindle bearings secured to the bar g andoperated by IOO- a position turned quarter-way around, or if entirelyturned over, so that its present upper becomes its lower surface, aswill be well understood, by which formation I am enabled to adjust orarrange the cutter c in the most appropriate position relatively withthe bar 9 and the piece of stone 70 under operation by simply movingsaid bar g and, without removing or disarranging the parts, securingsaid cutter c to the said bar g.

The slide h is mounted upon the box h, wherein it is operated by thescrew h, as may be desired and in the well-known manner which is similarto the operating by hand of most slides on lathes and other tools, whilethe box 7L is swiveled on the saddle h,.to which it is secured by thebolts h taking into the circular slots 7L5, made concentrically with thepivotal projection on said box h in order that the bar g may be adjustedwhen desired at an angle to the horizontal plane, by which means when itis moved by its screw 7i it will travel in a path at said angle to thehorizontal plane and so carry its cutter c to act upon the surface ofthe stone 70 at said angle. By this arrangement pieces of stone may becut into the shape shown by the sectional View, Fig. 15.

hen the machine is being used and the stone 7c is being fed to thecutter c, then reciprooatory motion is imparted to the saddle h from themain driving-shaft m (which de rives its motion from any prime motorthrough the pulleys m) through the medium of the gear-wheel m", securedto said shaft m, gearwheel m, fixed on the shaft m (carried by bearings77b crank or plate in, fixed on said shaft m and connecting-rod m",pivotally coupled to said crank m and to the saddle 77/, while when thecutter c is being fed to the stone in, this latter being moved orreciprocated lengthwise the bed a, as hereinafter described, then theconnecting-rod m is detached from the saddle h', and this latter ismoved vertically by the nut 71 on the screw h", being secured in the lugon said saddle 71/, which screw 7L is manually moved by the wheel 7L8through the gearing-wheelsb 71 (shown in broken lines, Fig. 2,) or thisscrew h may be automatically and intermittently rotated in one directionor the other by the ratchet 3 operating the wheel 4 as it isreciprocated by the crank 5, fixed on the rotary shaft 1", said crank 5being coupled to the lever 6, upon which the ratchet is mounted, bymeans of the rod 7, as shown by Fig. 14, or it (said cutter) is movedhorizontal by its screw it being rotated manually or otherwise.

The stone 7c is fixed or mounted upon the table a by the employment ofany of the wellknown devices at present in use. for effecting thispurpose, and said table it is made to slide upon the bed Ct at suchtimes as it is being used for feeding the stone 70 to the cutter c,

and which is usually at a comparatively slow rate of speed, by means ofthe screw a taking into the rack '12, fixed to said table a, this screwor being secured to the shaft 72, which is operated by its wheel 11,(which is secured to it by the clutch n gearing with the worm n fixed tothe shaft n operated in one direction or the other, according as towhether the gear-wheel a seen red to it, is being operated by the shaft0 directly through the wheel 0 and 0 or through these wheels and thewheel 0", (the positions of these being determined by the operativemoving the swing-plate 0 on which the wheels 0 and 0" are mounted by theholding-bar 0 the actions of which are well known,) the said wheel 0'deriving its motion from the shaft 0, which is rotated by a belt 0(shown in broken lines, Fig. 1) from the shaft m through the medium ofthe speedcones 0 and 0 and at the time this table at is being thus movedthrough the worm n the driving-belts which impart motion to the shaft 1)are on their loose pulleys p 19, while when a quicker movement isdesired to be imparted to the table it then the clutch n is thrown outof gear and one or other of the belts on the pulleys pp (according as towhich direction it is desired to rotate the shaft 29, one belt drivingit one direction, the other in the opposite direction) is shifted ontothe pulley p fixed to said shaft p, this latter being thereby rotated,its rotary motion being transmitted through the gear-Wheels p (which isfixed to the shaft 1)) and 13 (which is fixed to the shaft 72.) Thisquicker motionof the table is for the purpose of enabling the workman tobring the stone quickly up to the cutter when it (said stone) has beenproperly mounted on the table or for other purposes whereinacomparatively quick movement'is thought desirable.

For the purpose of operating the table at at yet a quicker speed, as isdesirable when the cutting operations have to be performed by itsmovements, the cutter c at this time being stationary, with theexception of its feed and rotary motions, which latter is at all timesproduced by its contact with the stone it is acting upon, the screw n isdetached or taken from the shaft 92 and the table a is coupled throughthe coupling part q, spring g, bar

mounted on the shaft 7", deriving its rotary motion from any primemotor. The bar q is made to slide loosely in the part q, so that it willby its shoulder press the hoop q against the spring q, which in turnforces the shouldered bush g against the part g on the rod 0", moving inthe direction indicated by the arrow .2, while when it is movingin theopposite direction the nut g at the end of the bar q forces the bush gto press the part q. Thus the power of the crank r is at all timesexerted on the table n through the resilience of the said spring q, bywhich means the motion of the said table it is more gradually arrestedand reversed at each extremity of its path than it would be had noresilience to be afforded its coupling parts.

ICC

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q and rod 1* to the operating-crank r,

The aetionsof the machineare as follows: Assuming that the cutting'operations have to be performed on the face It and by one cutter 0, asshown by the drawings, then the tablen is moved into its position withsaid cutter c by bringing one or other of the belts on the pulleys p 19onto the pulley 19 (the clutch n being at this time out ofgear.) On saidtable being brought thus into position the belt is shifted back onto itspulley p or p", and the clutch n is then put into gear, after which themain driving-belt is shifted onto the pulley m. Thus the cutter c ismoved or reciprocated vertically, while as it is completin g each risingand falling movement its tappets 9 and 10 are broughtinto contact withthe stop-piece 11. Thus motion is imparted to this rod f to cause it totilt or move the cutter by the lever f (the greater or less extent ofits said movement beingprearranged by the adjusting-pieces 12 13, beingfixed to lengthen or shorten the slot 14, made in said rod f, theactions of said pieces 12 13 and the rod f being transmitted to theleverf by coming into contact with the projection 15, fixed to saidlever f) either from the position shown in full lines, Fig. 9, into thatshown by broken lines of the same figure, or vice versa,these respectivepositions being merely assumed to be the right ones for the cutter c tooccupy when moving in its two separate directions for the purpose ofillustrating its movements, since I am well aware that the class,quality, or nature of the stone to be cut might require thismovement tobe greater or less, as well as the inclination of the said cutter c toit to be different to that illustrated, the setting of the said cutter cand the amount of motion that it will be necessary to impart to it inthis direction being left to the skill or judgment of the user or as towhat he might find most suitable for it to do. Further, 011 said rod fbeing moved as described a portion of its motion is trans mitted throughthe projection 17 to the lever 18, fixed on the spindle of the worm e,to the said cutter c in the other direction, thus moving it from theposition shown in full lines, Fig. 10, into the position shown in brokenlines of same figure, or vice versa, this said motion being regulated tobe sufficient to cause the cutter c to take the rough cut in onedirection while it falls back to take the finishing cut in the otherdirection, the extent of this motion also being determined as is that ofits other motion last before described. When two or more cutters c aremounted on the spindle d, this lastdescribed motion may or may not beemployed, as the user may desire or find to be advantageous.

At the time the cutter c is being reciprocated vertically, as abovedescribed, the stone is is fed thereto by the table 01. being moved bythe screw n, which at this time is rotated by the belt 0 and its severalintervening parts.

To prevent the cutters c from breaking away any part of the stone 7; asthe ends or extremities of same are being approached, they are mountedon the machine, say in the position shown in the drawings. Then theactions of the machine are brought into operation, as above described,to cause them to act in at one end of the stone 70 for a certaindistance, (the cutters being adjusted at this time so as not to cut tothe full depth to which it will be necessary for them to go to producethe finished surface, but nearly so,) on which the motion of the machineis arrested. The cutter is turned or tilted to perform its cuttingoperations in the opposite direction and the table 7?, moved, so thatthe other and upposite end of the stone 7c is brought into position,when the machine is again fully set in motion and the cutting operationscommence in at the opposite end of the stone is, whence they continueuntil the part first acted upon is again reached and now passed over,but since only a very slight cut is at this time required at this partthe force of the cutter against the surface of the stone is notsufficient to break it away, although its cutting actions are continueduntil the end is reached in order to leave the markings of the cutterthereon even and regular throughout the entire surface.

During the performance of the cutting operations, as above described,the crank r and its several parts are disconnected from the machine andare entirely inoperative. However, when the stone 7.: has to be actedupon lengthwise its surface these several parts are brought into use,while the shaft on is made inoperative and the connecting-rod m isdetached from the saddle 72. The motion of the crank r is thentransmitted to the table a, while the screw it causes the cutters c toadvance, as has been hereinbefore described. In this case the rod f isbrought into a horizontal position and its stop-piece 11 is fiXed to thetable n, as shown in broken lines, Fig. 4.

On the crank r being brought into use the table n is relieved of itsfriction on the bed a by the eccentric studs 18 of the trunnions 19being rotated to raise these trunnions 19 sufficiently to support thetable u just clear of its said bed a. Thus these trunnions act asantifrictiou-bearin gs at this time, while when comparatively littlemotion is imparted to the table a then they are lowered out of thisposition and remain inoperative.

Provided it is desired to have the cuttermarkings on the stone 7r at anangle to the vertical plane the vertical support I) is pivoted at 20, asshown by Fig. 13, so that it may be adjusted in any desired position byits adj listing-screws 21.

Of course it will be seen that for simple operations the ordinarystraight or scraping cutters may be used in connection with my improvedmachine instead of the rotary ones herein described, and often these maybe of great service, since when a mold has been cut or produced by therotary cutters the markin gs left by these may be somewhat unsightly.Hence a scraping-toolhaving its cutting edge formed to correspond withthe mold produced may be fixed to the opposite end of the bar 6,(somewhat as shown in broken lines, Fig. 2,) thus to be ready for use onsaid bar 9 being detached from its holder, turned over endwise, and itssaid scraping-tool brought into the position previously occupied by therotary cutter, the exact contour being in this way produced with easeand precision.

Such being the nature and object. of my invention, what I claim is v 1.In a stone-dressing machine, the combination of a rotary cutter, aspindle upon which said cutter is mounted, pivotal bearings forsupporting said spindle, swivel-bearings for supporting said pivotalbearings, means for eltecting a traverse of the cutter over the work,and means for automatically turning the said pivotal and swivel bearingson their respective pivots on the completion of the traverse of thecutter in each direction, substantially as and for the purposedescribed.

In a stone-dressing machine, the combination of a rotary cutter, aspindle upon which said cutter is mounted, a pivotal bear- .ingsupporting said spindle, a swivel-bearing supporting said pivotalbearing, an arm or lever applied to said swivel-bearing, a Worm andWheel applied to the pivotal bearing with an arm or lever on theworm-shaft, a sliding rod for operating upon said arms or levers, andmeans for reciprocating said rod.

3. In a stone-dressing machine, the combination of a rotary cutter, aspindle upon which said cutter is mounted, pivotal bearings forsupporting said spindle, swivel-bearings for supporting said pivotalbearings, means for operating said pivotal and swivel bearings, anadjustable supporting-bar, for sup porting said cutter and its bearings,and a sliding holder to which said bar may be detachably securedsubstantially as specified.

4. In a stone-dressing machine, the combination of a saddle movablymounted on suit able supports and having arc-shaped slots, a box pivotedon said saddle and carrying bolts engaging said slots, said box having aslideway extending diametrically across its face, a sliding holderengaging said slideway, means for adjusting said holder in the slideway,and a tool-supporting bar carried by said holder.

5. In a stone-dressing machine, the combination of a saddle movablymounted on suitable supports and having arc-shaped slots a box pivotedon said saddle and carrying bolts engaging said slots, said box having aslideway extending diametrically across its face, a sliding holderengaging said slideway,

means for adjusting said holder inthe slideway, a bar detachably mountedon said holder, a bearing swiveled to said bar, a bearing pivoted tosaid swiveled bearing, a cutting-tool journaled in said pivoted bearing,and means for adjusting said bearings, substantially as described.

0. In a stone-dressing machine, the combination of a saddle movabl ymounted on suitable supports and having arc-shaped slots, at box pivotedon said saddle and carrying bolts engaging said slots, said box having aslideway extending diametrically across its face, a sliding holderengaging said slideway and provided with a longitudinal recess, meansfor adjusting said holder, a bar square in cross-section for engagementwith said recess in any one of four positions, means for confining thebar in the recess, and a cutting-tool carried by said bar.

7. In a stone-dressing machine, the combination of a saddle movablymounted on suitable supports, a box pivotally mounted on said saddle andhaving a slideway extending across its face, a sliding holder engagingsaid slideway and provided with a longitudinal recess, means foradjusting said holder, a bar square in cross-section for engagement withsaid re cess "in any one of four positions, means for confining the barin the recess, and a euttin tool carried by said bar.

8. In a stone-dressing machine, the combination of a reciprocating tablefor supporting the stone, a crank-and-pitman mechanism for reciprocatingsaid table, a rod connected with the pitman and mounted to slide insuitable bearings 011 the table and having abutments, a sliding bushingsurrounding the rod and ex tending through one of the bearings, saidbushing engaging at one end with one of the abutments on the rod andbeing shouldered at the other end to abut the bearing, and a springinterposed between the other abutment on the rod and the shouldered endof the bushing, substantially as and for the purpose described.

9. In a stone-dressing machine the combination of rotary cutters, meansfor supportin g these cutters, mechanism for automatically operatingsaid cutters, sliding bearings upon which the cutters supports aremounted, means for operating said sliding bearings a table mounted toreciprocate in proximity with said sliding bearings, adjustabletrunnions for supporting said table, and means for impartingreciprocatory motion to said table substantially as herein specified.

JOHN SPENCER.

\Vitnesses:

HARRY ELLIsoN, PIcKLns BAILEY.

